Viscosity of Hydrogen* Nitrogen, and Oxygen, 



591 



Table T. 

 Viscosity of Hydrogen. 



^ T oof 

 observation. 



Tetnperatun 

 at begin nini 



°C. 



1 22-99.") 



2 23-015 



3 22-995 



4 23015 



5 22-995 



6 23-010 



7 22-990 



8 22-980 



9 22-995 



10 22-950 



11 23-005 



12 22-950 



13 23020 



14 23010 



15 23-005, 



16 23-030 



17 ......... 23-000 



18 22995 



19 23-010 



20 23030 



Temperature 



at end. 



°C. 

 23-010 

 23-040 

 22-980 

 23-035 

 23-000 

 23-005 

 22-990 

 22-980 

 22-985 

 22-960 

 23-000 

 22-950 

 23050 

 23-030 

 23-005 

 23-030 

 23-000 

 23-000 

 23 000 

 23-000 



Mean 

 Temperature. 

 °C. 

 23002 

 23-028 

 22-988 

 23-025 

 22-998 

 23-008 

 22-990 

 22-980 

 22-990 

 22-955 

 23-002 

 22-950 

 23-035 

 23-020 

 23-005 

 23-030 

 23-000 

 22 998 

 23-005 

 23015 



Mean 



■002 



J? xio 7 . 



881-27 

 881-96 

 881-15 

 882-61 

 883-73 

 881-23 

 880-25 

 880-65 

 883-38 

 881-83 

 884-35 

 880-53 

 880-41 

 812-99 

 882-10 

 883-13 

 882-80 

 881-35 

 881-82 

 882-72 



882-163 



The Viscosity of Nitrogen. 



The nitrogen used here was generated by heating up 

 a solution of NH 4 NQ 3 and dropping into it drop by drop 

 a solution of NaN0 2 . The chemicals were manufactured by 

 J. T. Baker Chemical Co., Philiipsburg, N.J. The maker's 

 certified analysis gave the following impurities : — 



For NH 4 N0 3 . 



Fe 



per cent. 



= o-ooi 



01 



- o-ooi 



so 3 



= 001 



Non volat. matter 



= o-ooi 



I 



= none. 



Fe ... 



For 



NaN0 2 . 



per cent. 

 — 0001 



CI ... 

 SO.,... 

 Pb ... 

 I 







.. = 0010 

 .. =0-001 



— none. 



K ... 

 NaOH 



Cu ... 







= trace. 

 = trace. 

 — none. 



Fig. 3 shows the arrangement of the generating and 

 purifying apparatus. It also consisted of a continuous piece 



